Fonts & Encodings

B.2. OFM

The OFM format (for "Ω font metrics") was defined by John Plaice and the author in 1994. It is an extension of the TFM format. The only difference (and it is important) is that the maximum number of glyphs grows from 256 to 65,536 and that the maximum number of kerning pairs and ligatures grows from 2¹⁶ to 2³². The human-readable file format associated with the OFM binary format is called OPL (= "Ω properties list"). The tools that convert OFM to OPL and OPL to OFM are, respectively, ofm2opl and opl2ofm.